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Factory High Stall Torque Converter
#1
Does anyone have the information concerning the High Stall Torque Converter out of a 72 CJ with 9 1/2 bolt pattern? I really can't seem to find any accurate info on it.
   

[Image: 2rr7aiv.png]

Just cruising along minding our own business when BAM!!! The LAWS show up.
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#2
72 and 3 CJ's used it
10 inch converter
2500 - 2800 stall
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#3
That sounds more reasonable. Hell I was seeing anything from 2500-4000 and knew that wouldn't be right. But couldn't find any Ford documents.

[Image: 2rr7aiv.png]

Just cruising along minding our own business when BAM!!! The LAWS show up.
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#4
marks73;98994 Wrote:That sounds more reasonable. Hell I was seeing anything from 2500-4000 and knew that wouldn't be right. But couldn't find any Ford documents.

Ya..according to some sites..the 73 4v like i got...has a 3,000 rpm stall {2800 im sure isnt too far off the right mark} But i heard the same......and yes mine does have 9"1/2 bolt pattern..Ill try to snap some pictures of mine...It the same as the black one you posted..besides mine is painted green...I have compared it too a 3500 stall..a 4,000 rpm stall my freind has for his drag cars...and it does seem to be around a 3,000 stall in size.


From ebay motors Ford's Small Block C6 - A Gem
Many 1972 -1974 351C-4V CJ engines were mated to Ford's C6 automatic transmission. Ford used a special high-stall (3000 RPM) torque converter (D20Z-7902-A) and flywheel (D1ZZ-6375-C).
not sure how correct that is..but my stall defenatly has a 9 1/2 bolt pattern and fly too match it
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#5
Sorry for the bad pics...I using my desktop cam to get the pictures...but its 9 1/2 too each bolt hole...The whole vert is barely 10 inches across...this vert been in my car for atleast 20 years that i can account for...and my car was basicly stock..original carb and everything still on it...Im pretty sure its factory...and looks identical in every way too the black vert you just posted..lol
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#6
Anybody know where Ford might have hidden their specs?

[Image: 2rr7aiv.png]

Just cruising along minding our own business when BAM!!! The LAWS show up.
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#7
another thread from another forum

http://www.network54.com/Forum/119419/th...de+Mustang
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#8
I been looking for years for the official ford specs...But i cant find them..I found alot of dif motor mags stating 2200 too 3000....I believe its closer too 2800 too 3000..cause every where i read most 3,000 rpm verts are 10 inches wide...Lower the rpm the bigger the converter...My 4 bolt converter above is 10 inches across...9.5 too the bolts...and driving my car for over 18 years...i know it wouldnt start to pull good till 2800-3000 rpm..Then it would become a diffrent animal..I use to think it was mainly the heads...Till i took apart the motor and seen the little vert in there...thats one of the many reasons why she didnt come alive till 3,000...lol.."including the heads" Those big 4v heads are really made for race and high revs...with out the little vert...My car would fall on its arse every time i tried to take off from a stop.
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#9
Yep. We went from a CJ converter to a truck 400 converter. Talk about no stall. It lugged just going into gear at idle.

The 2,000 stall I have in there now is a nice compromise.

1973 Mach 1 Q code 351 4V, 9A paint, standard interior, 3.50 rear, C6 trans.
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#10
marks73;99009 Wrote:Anybody know where Ford might have hidden their specs?

I've never found it in any Ford manual. Probably in a supplement I don't haveAngry. I've heard a lot of numbers over the years. The number I've heard most often and makes the most sense to me is 2000-2200. Without a REAL trans cooler and the gears available from the factory a lot more than that would be heating the trans fluid too much for the factory to warranty. The stall speed is not precisely fixed. It will vary somewhat depending on the amount of torque the engine makes. Chuck
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